Pulling machine



March 4, 1924. 1,485,804

C. J. NEDDERSEN PULLING MACHINE 7 Filed Aug. 15 1922 2 Sheets-Sheet 1 qINVE/VTOP. CHARLES J. NEDDERSEN BY M m March 4, 19240 I 1,485,804

' C. J. NEDDERSEN PULLI-NG MACHINE Filed Aug. 15. 1922 2 Sheets-Sheet 2IN l/ENTOR. CHARLES J. NEDDERSEM ATTO/PNEYS.

Patented Mar. 4, i924.

i f ifi.

CHARLES J. NEDDERSEN, OF OAKLAND, CALIFORNIA, ASSIGNOR OF ONE-HALF TSIGMUND KIRSGHBERG, OF SAN FRANCISCO, CALIFORNIA.

PULLING MACHINE.

Application filed August 15, 1922. Serial No. 581,922.

'10 all whom it may concern:

Be it known that I, CHARLES J. Nnnnnn- SEN, a citizen of the UnitedStates, residing at Oakland, county of Alameda, and State a ofCalifornia, have invented new and useful Improvements in PullingMachines, of which the following is a specification.

This invention relates to sewing machines such as employed in connectionwith tent lo and awning work, and especially to a pulling attachmenttherefor.

Jhen sewing heavy fabrics, such as canvas, etc, employed in tent andawning work, an operator and a helper were usually required for eachsewing machine. The operator guides the material and actuates the sewingmechanism, while the helper pulls the fabric away from the sewingmachine and removes each section complete. To imso prove this conditiona so-called pulling machine has been applied to sewing machines of thischaracter with the object in View of entirely eliminating the helper.Practical experience has however shown that even as though a pullingattachment is applied, a helper can be employed to advantage as atwo-needle machine with a pulling attachment, without a .helper, willsew approxiiately 1900 yards in eight hours, while a and for raising andlowering the same with the goods when required.

Other objects will hereinafter appear.

One form which my invention may assume is exemplified in the followingdescription and illustrated in the accompanying drawings, in which Fig.1 is a side elevation of a sewing machine partly in section, showing theapplication of the pulling attachment.

Fig. 2 is an end View of a sewing machine partly in section, said viewillustrating the sewing mechanism and the needles operated thereby andalso illustrating the pulling attachment and the position thereof.

Fig. 3 is a detail view of a compound clutch employed, said clutchserving the function of a feeding and a checking clutch, and furtherserving the purpose of driving the pulling attachment.

Fig. & is a cross section of the clutch taken on line 4.-4, Fig. 3.

The present invention relates to that type of sewing machine which isadapted for heavy fabrics, such as canvas, etc., employed in tent andawning work, and it relates especially to a pulling attachment wherebythe fabric is removed or pulled away from the sewing mechanism duringthe operation of 1L m ruihlco rhiteilp'lc .EJlIlIHIlTUfLSBGlUETU smetosthilplorsi. l 1 and. 1 112.2.

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The cloth advancing through thesewing mechanism is fed and advanced inthe usual manner, that is by a step-like intermittent moven'ient, and itis therefore essential that the corrugated pulling rolls be similarlyrotated as the fabric might otherwise be pulled away from the needlesand thereby interfere with the sewing operation. For this reason anintermittent turning movement is transmitted to the lower rolls 8 and 9,and this is accomplished in the following manner:

Shaft 5 is SUPPOltQCl in a pair of journal members indicated at 14 and15. Surrounding the shaft and turnable independently thereof is a sleeve16 and forming a part thereof is a clutch member. This clutch member haspockets formed therein as indicated at 18, and a roller 19 is disposedin each pocket. These rollers engage with the inner surface of theclutch housing 12 and form a driving connection between the clutchmember and the housing when the sleeve 16 is turned in. one direction.In other words a roller type of clutch is employed and is in thisinstance divided into two clutch sections as shown at 20 and 21, theclutch section 20 being intermittently rotated by shaft 8 through meansof the eccentric 4, the rod 6 and the crank arm 7 which is secured tothe sleeve 16. The clutch section 21 rotates the entire clutch housingand the corrugated roller 9 secured thereto. The housing again drivesthe clutch section 21. and a sleeve 22, and as this sleeve is keyed tothe shaft 5, an intermittent movement will be transmitted thereto, thatis a roller clutch of this char acter is positive in action and as suchtransmits movement to the housing 12 and the shaft in unison, and as oneclutch is reversed withrclation to the other, retrograde or reversemovement of the feeding rolls 8 and 9 is prevented. The clutch 20 maytherefore be termed a feeding clutch and the clutch 21 may be termed achecking clutch.

The upper feeding rolls 10 and 11 are journaled in fork shaped memberssuch as shown at 25 and 26 and these members are in turn carried by rods27 and 28, which are suitably journaled in bearing members carried bythe puller head C. Each of the rods 21 and 28 is surrounded by helicalsprings as shown at 29 and these springs normally exert a downwardpressure on the rods and the forks 25 and 26, thus maintainingfrictional engagement between the upper and lower feeding rolls. Howeverwhen it is desired to enter the fabric or to release the same, the upperrolls are manually lifted through means of lifting levers such asindicated at SO and 31. These levers are connected to'a common rod 32 bymeans of links 33 and the rod 32 is again connected to a foot treadlenot here shown, that is when pressure is ere erted on the foot treadle,a downward pull will be exerted on the rod 32 and the links 33 and thelifting levers 30 and 31 will then swing about their pivotal mountingsand exert an upward lift on the rods 27 and 28. The upper rolls 10 and11 are in this manner elevated and the fabric may then be freely exertedor removed. The advantages of the duplex or compound pulling attachmenthere shown a re numerous: first of all it materially increases theoutput or apacity of the sewing machine; secondly it entirely eliminatesthe use of a helper; third, it always maintains or exerts a straightpull on the fabric passing through the sewing mechanism and as suchproduces a regular or straight scam. It fi'uthern'lore prevents bunchingof the fabric between the needle and the throat of the machine and inother words relieves the operator of any care outside of that of guidingthe material to the needles and actuating the sewing mechanism. With thepulling attachments now in use 1900 yards of sewing are produced in fivehours and forty-five minutes, but a helper is required to produce thisoutput, while with the pulling attachment here shown 1900 yards ofsewing are produced in four hours and forty minutes, and without the useof a helper. The capacity of the sewing machine is thus materiallyincreased and the wages and time of a helper may be entirely eliminated.

While certain features of the present invention are more or lessspecifically illustrated, I wish it understood that various changes inform and proportion may be resorted to within the scope of the appendedclaims, similarly that the materials and tinish of the several partsemployed may be such as the experience and judgment of the manufacturermay dictate or various uses n'iay demand.

Having thus described my invention, what I claim and desire to secure byLetters Patent is 1. The combination with the sewing mechanism on asewing machine, of two separate pairs of devices for gripping the fabricafter it has passed through the sewing mechanism at two separatehorizontally spaced points behind the needles, and means to operate saidgripping means intermittently in unison to effect a double, side byside, pull on the fabric to preventbunching of the fabric between theneedle and the throat of the machine and thereby effect the productionof a regular or straight seam.

2. The combination with the sewing mechanism on a sewing machineincluding the pulling head of the machine,of separate gripping meanslocated to grip the fabric after it has passed through the sewingmechanism at two spaced, side by side points, one of said gripping meansbeing located substantially midway between the ends of the pulling head,and means to operate said separate gripping means to exert anintermittent double, side by side pull in unison on the fabric.

3. The combination with the needle and the needle actuating mechanism ofa sewing machine, of a pair of corrugated rollers disposed on thedischarge side of the sewing mechanism and in alignment with theneedles, a second set of corrugated rollers dis posed on the dischargeside of the sewing mechanism and spaced from the first named set ofrollers, and means for imparting an intermittent rotary movement to bothsets of rollers in unison to effect a double, side by side pull on thefabric to prevent bunching of the fabric between the needles and thethroat of the machine.

4:. The combination with the needles and the pulling head, the needleactuating mechanism of a sewing machine, of a pair of rollers disposedon the discharge side of the sewing mechanism and in alignment with theneedles, a second set of rollers disposed on the discharge side of thesewing mechanism and spaced horizontally from the first set of rollersand located substantially midway between the ends of the pulling head,and means for imparting an intermittent rotary movement to both sets ofrollers in unison to effect two separate, straight, side by side pullson the fabric to prevent bunching of the fabric between the needles andthe throat of the machine.

5. The combination with the needles and the needle actuating mechanismof a sewing 7 machine of the character described, of an upper and alower corrugated roller disposed in alignment with the needles and onthe discharge side of the sewing mechanism, said rolls adapted to gripand engage the fabric after passage through the sewing mechanism, anupper and a lower corrugated roller disposed on the discharge side ofthe sewing mechanism and on one side of the first named rolls and inhorizontal alignment with and spaced from the first named rolls, andalso adapted to receive and grip the fabric, and means for imparting anintermittent rotary movement to both sets of rolls in unison.

6. The combination with the drive shaft in a sewing machine of thecharacter described and the sewing mechanism actuated thereby, of ashaft disposed adjacent the drive shaft and arranged in parallelismtherewith, a double acting roller clutch on said shaft, an eccentric onthe drive shaft, a crank arm actuating one of the roller clutches, aconnecting arm between the crank arm and the eccentric whereby anoscillating movement is imparted to the clutches, a corrugated rollersecured on the second named shaft, a second corrugated roller carred bythe clutch and located remote from the first named roller, and a pair ofcorrugated rollers disposed one above each of said rollers andcooperating therewith.

CHARLES J NEDDERSEN.

